Fitness Timer: do your fitness :)

Yes, we are getting older. Yes, we sit too much. There are no alternatives, we have to stretch and strengthen the muscles :). In German: "Turne bis zur Urne". Men are not multitasking. So breathing and counting the seconds is not possible. So use the "Fitness Timer" :).

Some infos:
Three tones are generated. The first darker tone starts the exercise. After e.g. 45 s a brighter tone indicates that the repeat is finished. After a pause (e.g. 15 s), the next repeat is done. After x (e.g. 3) repeats a triple tone indicates the end of the exercise.

We have two buttons to choose between 2 programs. Different programs can be assigned to the buttons with the help of an encoder with push-button.

The hardware is very simple, no PCB needed. I use a LOLIN/WEMOS D1 mini Pro (V2.0). with Lithium battery interface and the 0.66" OLED shield (Wemos) with 2 I²C buttons (V2.1).

BOM